Improvement in machines for making nuts and washers



" UNITED STATES fN PATENT OFFICE.

cHAELES r. GEISSENHAIHER, on rrrrsnunc, PENNSYLVANIA, ASSIcnoH i `CroHIMSELE AND JosErH GEAEE, oF SAME PLACE. i

IM PRovEM ENT INMACHLNESFOR MAiliNcfNu'l-SAND WASH ERS.

Specification forming part of Letter To all whom it may concern. y

Be it known that I, CHARLES P. GEISSEN- HAINER, of the city ofPittsburg, in the county of Allegheny and State of Pennsylvania, haveinvented a new and useful Improvement in Machines for Making' Nuts andWashers; and I do hereby declare the following to be a full, clear, andexact description thereof, reference being had to the accompanyingdrawings, forming part of this specification, in which- Figure lis aperspective representation of my improved machine. Fig. 2 is alongitudinal section through the dies, Sleeve-box, and punch.

In both figures like letters are employed to denote similar parts.

My machine is designed to make nuts or washers of iron bycutting andpunching a blank to form a nut without compression of the blank withinthe die-box.

In the drawings, c u'I is the frame-work of the machine, having twocross-heads, b and c, rmly secured to the frame.

The die d, againstt-he face of which the nut .or washer is cut off andpunched, is a block of iron or steel of equal `diameter throughout, andof such exterior shape and diameter as the nut or washer to be madethereby. It is also perforated from end to end by a cylindrical hole, e,of the size of the eye of the nut or washer. This died is sethorizontally in the cross-head l) at the front end of the machine, andsecured thereto by set-screws, so as to be adjusted in position, and,when necessary, replaced by another die of different diameter or shape,so as to make other descriptions of nuts or washers.

The die cl passes through the cross-head I1, so that the burr or wad cutfrom the eye of the nut may be discharged at e.` In the same horizontalline with the die d is placed the counter-die f, whichis ofthe same`shape and diameter as the die d, and, like it, perforated from end toend by acylindrical hole, in which the round punch his situate. Thecounterdie f is rmly attached to the cross-head c, with its faceopposite to and parallel with the face of the die d, the distancebetween the opposite faces of the die d and counter-die f being a littlegreater than the thickness of the bar from which the nut is to be cut.

s Patent No. 57.042, dated August?, 1866. i

The die d and counter-die f do not change their relative position normoveat all during the operation of the machine. y

The round punch h, which works `inside of the cavity of thecounter-dief, is attached to the sliding frame k. The sliding frame hasa reciprocating motion lengthwise `of the machine, which motion iseffected by the revolving cam Z, working in a' yoke at the rear end ofthe sliding frame 7c. i

Attached to the front end of the frame k, so

as to slide back and forth with it, is the sleeve or hollow die g, whichis a hollow cylinder, the cavity of which is the exact counterpart ofthe counter-die j' and die d. This hollow die is placed on thecounter-diefso as to slide upon it, while the counter-dief isstationary.

In Fig. l the sleeve gis represented as projecting so far as to coverthe space between the faces of the die d and counter-diie f, andextending over onto the die d, a portion of one side of the sleeve beingrepresented as broken off, so as to show the position of the otherparts.

As the sleeve gand round punch h are both attached to and move with thesliding frame k, they always preserve the same relativeposition and itis an important feature of my machine that the forward end of the roundpunch h and face of the hollow die o rsleeve g are not exactly in thesame vertical plane, the object of which is that (although the punchingand cuttingof the nut are done simultaneously) the punch and sleeve maynot begin to operate on the iron to form the nuit at the same time, butone a little before the other,

which has the effect of relieving the strain on those parts.

In my machine the point or extremity of thc round punch h lies a littleback of the face of the hollow die or sleeve g, and so continues duringthe entire operation.

Having thus described my machine, I will explain the mode of itsoperation. y

When the sleeve g and punch h (which are the only operative parts thatchange their position n making a nut) are drawn back, as in Fig. 2, abar of iron from which the nut is to be madeis fed in between the die dand counterdie f, resting against the face of the die d. The sleeve gand round punch h then advance and press against the iron bar. As thepunch is a little back of the face of sleeve y, the iron begins to enterthe cavity of the sleeve before it reaches the end of the punch; but asthe sleeve and punch are still farther advanced the sleeve cuts offthenut against the face of the die d and passes over the nut or receivesit in its cavity, While at the same time the punch passes through thenut, forcing the burr or wad from the eye of the nut into the bore e ofthe-die d. The sleeve g and punchlt are then in the position shown inFig. l and by dotted lines in Fig. 2, and the nut is ready to bedelivered from the machine. This is effected by the backward motion ofthe sleeve g and punch h, which, in resuming their flrst position, bringthe nut against the face of the counter-die f, by which the nut is heldstill While the sleex'e and punch Withdraw from it, and the nut thendrops away from the machine.

What I claim as my invention is- The combination of the stationary diesd and fwith. thc hollow die or sleeve g and punch h, Which movetogether, arranged and oper-

